Door knob latch set



April 10, 1956 R. L. CRANDELL 2,741,502

DOOR KNOB LATCH SET Filed NOV. 19, 1953 FIG. i.

FIG. 5. FIG. 6. 43 "WENTOR Y, [l4 ROY L. CRANDELL m" m l8 1 3 BY m1 L 23 f ATTORNEY United States Patent 2,741,502 noon KNOB LATCH snr Roy L. Crandell, Van Nuys, Calif., assignor to Hollyrnade Hardware Manufacturing Company, Les Angcles, Calif, a corporation of California Application November 19, 1953, Serial No. 393,096

6 Claims. (Cl. 292-169) to provide an assembly of a spring latch, rosettes, operat ing spindle and a pair of knobs, which assembly is simple and requires a minimum of installation efiort. These and other objects are attained by my invention, which will be understood from the following description, reference being made to the accompanying drawing, in which:

Fig. 1 is-a planview, partly in cross-section, showing my new door-knob latch set;

Fig. 2 is a cross-sectional view taken on the line 2-2 of Fig. 1;

Fig. 3 is an outside end elevational view of the left rosette; v

Fig. 4 is a cross-sectional view taken on=the line 44 of Fig. l;

Fig. 5 is a side elevation of a knob neck insert;

Fig. 6 is an end view of the insert shown in Fig. 5.

Referring to the drawings, my latch set consists, generally, of a pair of knobs 11 (right )and 12 (left), which are operatively connected together by a spindle 13, which i is half cylindrical in cross-section. The spindle i3 is operatively attached to each of the knobs by means oi a plug insert 14, which is provided with a half circle axial opening 15, the plug insert being attached to the neck 16 of each of the knobs 11 and 12 by dimples 17 in corresponding depressions 17-a. The plug inserts 14 are provided with an inwardly directed extension 18, there being a tapered shoulder 19 which serves as hearing surface to a corresponding bearing recess 29 in the rosette 21 for knob 11 and correspondingly the rosette 34 for the knob 12. Extending radially from the plug insert extension 18, are ears 23 extending outwardly, preferably at opposite peripheral positions, on the said extension 18, near the inner end thereof, these cars being adapted to slidably engage the inner surface 24 of the rosette bodies 27 and 34 to prevent the removal of the plug inserts 14 and attached knobs 11 and 12 after the latch set is assembled on the door. The right rosette 21 consists of outer cover 25, having an outer axial collar 26 which is adapted to overlie the neck 16 of the knob 11, and a rosette body 27 fitting within the cover 25', said body having an axial opening 28 adapted to receive the plug insert extension 18, with the faces of the cars 23 abutting the surface adjacent the axial opening, there being provided ear slots 29 at diametrically opposite positions disposed at right angles to the latch bolt 40. At positions in line with latch bolt 40 and at opposite peripheral positions, there are provided connecting posts 30, extending inwardly through the door toward the opposite rosette 22. Threaded holes 31 are provided in the ends of each of said posts, these being adapted to receive assembly screws 32 whose heads are accessible on the outer face of the V rosette 22. The connecting screws join the two rosettes through the door and clamp the rosette peripheral edge faces aaginst the edges of the opening or hole 45, in the door 46. The left'rosette 22 similarly consists of an outer cover 25 and a rosette body 34, which rosette is provided with an axial opening 28, having ear slots 29 for the cars 23 of the plug insert extension 18. The rosette 22 is provided with connecting screw holes 35, aligned with the connecting posts 30 whose threaded holes 31 are adapted to receive the assembly screws 32 to secure the parts together in the opening 45 of the door 46. The ears 23 on the cylindrical extension 18 of the plug insert 14 for the rosette 22, on the left, are also positioned, when assembled, to be atright angles to the latch bolt 40.

The spring latch bolt unit 37 consists of an. outer housing 38 which is substantially cylindrical in cross-section, but flattened on thetwo sides 39, there being a notch 41 in the inner end of the housing 38 adapted to engage one connecting post 3% and a hole 44 at a position opposite the spindle adapted to receive the other connecting post 36. A spindle hole 42 disposed between the notch 41 and'the hole 44 through which the spindle 13 passes is provided, and engages the ends of the yoke member 43 for retraction of the latch bolt 44 When the spindle 13 is rotated in either direction, the edges of the half cylindrical spindle abut the ends of the yoke member 43, and retract the latch bolt 40. The latch bolt unit 37 consists of a flattened cylindrical latch bolt 4i? which is provided with a longitudinal extension 41 at one edge thereof, upon which the yoke member 43 slides longitudinally within the housing 38. A compression coil spring 59 is disposed between the outer end 51 of the yoke member 43, and the inner end 52 of the latch bar '46, this spring projecting the latch bolt or bar 40 outwardly at all times, except when it is positively retracted by the turning of the spindle by either of the knobs. The edges of the half cylindrical spindle abut the arms of the yoke and the inward movement of the yoke member 43 actuates a retracting lever 53 pivoted by the pin 54 to the flat walls of the housing 38, the said retracting lever being disposed within a slot, or opening 55, arranged for compactness in the yoke member 43. The latch bar 40 is free to move inwardly irrespective of the position of the spindle or the yoke.

In mounting my latch set on a door, a hole is drilled through the door, this hole being in diameter slightly less than the diameter of the rosettes, so that the peripheral edge of a rosette clamps against each margin of the hole. A latch bolt hole 55, connecting at right angles with said main hole, is provided from the edge of the door. The latch bolt housing 33 is inserted in said hole from the edge of the door, and the corresponding rosette 21 is inserted against the right face of the door, with the operating spindle 13 in position in the insert 14 of the attached right-hand knob 11, and projecting through the spindle hole in the spring latch unit, the edges of the half cylindrical spindle abutting the ends of the yoke member 43 inside the latch bolt house 38. The outer end of the spindle is then inserted in the opening provided in the plug insert 14 of the left knob 12 and rosette 22, the rosette being rotated so that the assembly screw holes 35 are in position adjacent the threaded holes 31 of the posts 31 in this position, the ears 23 on the left-hand plug insert 14 are at right angles to the ear slots 29 on the rosette 22, thus preventing removal from the rosette 22 of the knob 12 with its plug insert 14, but leaving the knob and insert rotatably joined. The assembly screws 32 are then threaded into the threaded holes 31 of the connecting posts 30, to clamp the rosettes 21 and 22 to the door, the spring latch bolt unit being laterally slidable on the posts 30 and on the half cylindrical-spindle13 te -accommodate itspositioningin doors of varying thickness.

T a embly is, s i l! rem ed frqm edger b1112 ,cee'diiigi i steps'in reverse sequencetio those described;

. "The; rosette i l 3 $l he latchihonsing r p eferably, made from 'die' castings, while the knobs'jrosette covers;

ar'e'niade spinning thin sheets of metal.

The" advantages of simple latch set will be apparent. The small number of'par ts and the adjustability of the assembly for difi'erent thickness of doors gives a marked advantage in the mounting of the latch set-on a door. L

A 'sirnple meansi'for rotatably; attaching the knobs to the rosettes, for the limited turning required to actuate the latch bolt, resultsv from the provision of earslots 'and ears disposed 18 Q apart. The simplicity of construction re sults in lower manufacturing costs and the'interchangeability of parts.

I'claim: i a 1. In a door-knob latch set having-a spring latch unit adapted to be mounted in a hole extending inwardly from V the door edge, and having a spindle-engaging means whereby said latch is operated by a spindle tnrning of less than one-half revolution; a latch operating means 7 comprising spindle" adapted to actuate said latch'unit; a

rosette adapted to be reniovably held on the face of, a door by bolt means connecting with a rosette on the 0pposit e face'of tth'edoorg a door-knob having a tubular neck'and a spindle-engaging plug inse rt non-rotatably at tat-been said neck, said plug having ears extending ra dially: from the periphery of said plug; said rosette having axial hearing for said insert, said bearing having pe-" a ripheral slots for said ears extending from the front to the rear faces of said bearing; said ears on said insert beingpositioncd to rota ably secure the knob to said rosette within the limits of turning'of said spindlein the actuation ofthe said latch unit.

'2. Ina door-knob latch sethaying'a spring latch unit adapted to be mounted in a hole extendinginwardly from the door edge, and having a spindle-engaging; means whereby said latch istop erated by a spindle, turning or I less than one-half revolution; latch operating means comra segmental cylindrical spindle adapted to actuate said latch unit, said spindle being rr'sia said'la'tch unit; a rosette adapted to be removably the t'ace ofa door by bolt means connecting with a rosette on the opposite face of the door; a door-knob having a'tubular necx and a spindle engaging plug insert non-rotatably' attached in said neck, and having an ex; tension inwardly of said neck, said extension having ears projecting radially front the periphery of said extension;

said rosette having an axialbearing for said insert, and

longitudinal peripheral slots adapted to receive saidears on saidinsert; said ears onsaidtinsert being positioned to rotatably secure the knob to said axially removable.

mineto rernovably connectfthe free e nds of rosettewithin the limits of turning of said spindle inthe afuationof said latch unit.

3. Ida'door-lrnob latch set havinga spring latch unit adapted to be mounted in a hole extending inwardly from door edge, and having a spindle-engaging means whereby said latch is operated by a spindle tarning of less' thajn one-iourth revolution injeither direction; latch op ating means comprising a segmental cylindrical sp ndle adapted to actuate'fsaid latch'unit, said spindle being "a'xiall yremovable from said latch lun ittja pain of L es ap ed to m rab yz ressed, gai s epp-t I i- 3E ares ft ga Qdqq rf bltil eaas on ec n than F together; a pair of door knobs having tubular hubs; a

spindle-engaging pluginsert non-rotatably attached in each of said hubs, each of said plugs having ears extendradially from its periphery; each of said rosettes having an axial bearing for its corresponding plug insert,isaid bearing having longitudinal peripheral slots for said ears extending from the front'to the? rear faces of said hearing; said ears on said plug inserts-being positioned to rotatably secure each knob' to'i'ts corresponding rosette within the limits of turning of said spindle, in the actuation of said latch unit. i

4. In a doorknob latch set having a spring latch unit adapted to be mounted in a hole extending inwardly from the door edge,'and'ha'ving a spindle-engagingrneahs whereby said latch is operated by a spindle turning of less than one-fourth revolution in either direction; latch operating means comprising a segmental cylindrical spindle pt d to t a e said e ch n t; sa d. pindl bei g axially removablejfromsaid banana; a pair oirosettes p e t e em ab press d, again the. gnpg te a e f. or, one of, sa d rdsettesfh ,1 t g p st ex ndin owar t' a d ther' qse aid post -t aid S ew mean other rosette; a pair of doorknoljsl havingftnbularhub's'; a p n l -en a pl ns rt noniq tah v t a d ri each of i said hubs, and having ears extending radially; from the periphery of said plug insert; each of said rosettes, ar n v n x al, e r ng f r, t r spondi pl s n srt sh e r n a l n pn' m r l P iphe al slots for said ears extendingfrorrione face of saidbeairg' i he r ace; s d ear on, ai p a nserts. s'pq i o sd' q ta abl ecure e h n b of corresponding rosette within the limitsjof turning of said spindle in the actuation of saidlatch unit 1 a es kn h latch s "m a s or moun n doorknob for limited rotary"movement in a rosette attachable, to a face of a door comprising a doorknob having a hub and having ears extending radially firoin the peripheryv of said hub; arosette' having an axial bearing for said hub, said bearing having longitudinal I peripheral slots extendingfrom the inside face to the outside fa ce' of. said bearing, s'aidlslots being positioned to receive said ears of said hub saidears, when rotationally positionedout of alignment with said, slots, being adapted to rotatably secure' the" knob to said rosette; and means connecting said rosette through tne door to an opposing rosette whereby to prevent relative; rotary movement thereof. f

'6. In a doorknob latch set, means for mounting a doorknobf for limited rotarylmovernentin a rosette attach able to a face of a doolr comprisin gadoorknob having a tubular neck; a spindle-engaging plug insert nonroi tat ably attached in saidhubfandfhaving ears extending radially from theperiphery'oi said' insert; a rosette aav ing an axial bearing ioi fsaid insert, said bearing having I longitudinal peripheral 'slotsefie from the front face" to the rear face of said bearingfsaid slots being positioned to reo eiv'e said ears of said insert, said fears when rotationally positioned out of alignment with said slots being adapted :to'frot'atably secure'the knob tosaid rosette; and meansjconne'c'tingsaid rosette through the door to an opposing rosette whereby to prevent relative rotary movement thereofI K References Cited in the file of this patent UNITED 1 STATES PATENTS r 1,685,316 Devereaux Sept. 25, 1928 1,826,093 Schlage Oct. 6, 1931 1 1,985,223 Anderson- Dec. 25, 1934 2,646,301 Cerf July 21, 1953 2,662,388 Hillgi'en Dec. 15, 1953'- 2,683,053 Russell et al. July 6 1954 2,701,160 Teichet a1. Feb. 111955 ELGN- ATENT Tiff-"3 ?f, PXL ri afit ft 

